3. Slag/rock-based geopolymer cement

Raw materials :

• MK-750 metakaolin or calcined clay ;

• blast furnace slag ;

• volcanic tuffs (calcined or uncalcined) ;

• mine tailings ;

• alkali silicate (user-friendly ).

Geopolymer structure :

Si:Al = 3; crude formulation (K,Na,Ca)-poly(sialate-disiloxo); actually a solid solution comprising two geopolymers:

• Si:Al = 1, Ca-poly(disialate), hydrated anorthite type;

• Si:Al = 3-5, (K,Na)-poly(sialate-multisiloxo)

  with calcium disilicate hydrate CaO.2SiO ₂ .2H ₂ ...